The emergence of power meters for running

Up until recently, the only way running power has been measured has been via a laboratory setting using ground impact force plates.

There’s now a new performance measurement tool for runners on the market, and It is predicted that it’s going to dramatically evolve the way we train, race, and perform down the road.

http://home.trainingpeaks.com/blog/article/running-with-power-how-it-works-and-what-it-means